Modifying a table while iterating over it?

["Cory Bloyd" <cory.bloyd@...>]

What happens when you modify a table while iterating over it?

I would expect the following iteration to proceed unaffected by the modifications, but I’m not certain...

 

for key, value in pairs(someTable) do

      if someArbitraryCondition() then

            someTable[key] = nil

      end

end

 

I would expect the following code to behave unpredictably regarding whether or not the new items appear in the iteration.

 

for key, value in pairs(someTable) do

      if someArbitraryCondition() then

            someTable[newKey()] = newValue()

      end

end

 

Can anyone confirm or deny my suspicions?